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梁志刚, 陈云敏, 陈赟. 利用同轴电缆电磁波反射技术测定非饱和土的含水率[J]. 岩土工程学报, 2006, 28(2): 191-195.
引用本文: 梁志刚, 陈云敏, 陈赟. 利用同轴电缆电磁波反射技术测定非饱和土的含水率[J]. 岩土工程学报, 2006, 28(2): 191-195.
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LIANG Zhigang, CHEN Yunmin, CHEN Yun. Measurement of water content of unsaturated soil by TDR technique[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(2): 191-195.
Citation: LIANG Zhigang, CHEN Yunmin, CHEN Yun. Measurement of water content of unsaturated soil by TDR technique[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(2): 191-195.
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利用同轴电缆电磁波反射技术测定非饱和土的含水率

Measurement of water content of unsaturated soil by TDR technique

    摘要
  • 摘要: 针对同轴电缆电磁波反射技术在量测非饱和土土体含水率方面的应用,在理论上研究了该技术的基本原理,从极化机理出发,推导了电磁波与单相介质相互作用的模型。在该模型的基础上研究了电磁波与非饱和土介质的相互作用,建立了非饱和土介质介电常数与体积含水量之间的关系模型。对不同的土样进行了一系列的室内试验,试验表明,模型能很好地描述非饱和土介质介电常数与体积含水量之间的关系。

     

    Abstract: For the applications of coaxial-cable electromagnetic wave reflection technique in measuring soil water content and pore ratio,the interaction model for EM wave and single media was deduced based upon polarization mechanism.Then the relationship between dielectric constant and volume water content or pore ratio of unsaturated soil was established.Different kinds of soil samples were tested.From the experimental results,it was found out that the relation curves of soil samples were almost consistent with each other and fittd the model well.

     

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